Furnace-casing.



C. A. KENNEDY. FURNACB GASING.

APPLIOATION FILED JULY 12, 190sA /VTNEEEEE I INVENTDH Wgr CHARLES A KENNHDY. www @v5/Wm CHARLES AVERY KENNEDY, OF COATICOOK, QUEBEC, CANADA.

FURNACE-CASING.

meeste.

Specification of Letters Patent.

Patented Mar. l0, 1914!-,

Application filed July 12, 1909. Serial No. 507,234.

To all whom 'it man concern` f Be it known that l, @nannies .A vnny Kun- NEDY, ol Vthe town ot' Coaticook, in the Province of Quebec and Dominion oit Canada, a subject ot the KinnI oit Great Britain, have invented certain new and useful Improvements in Furnacethisings, ot which the 'liollowing is a full, clear7 and exact description.

My invention relates to improvements in casings 'for furnaces and the like, and the object is to provide an inexpensive and ellicient casingr which will lgreatly reduce the 'radiation ol' heat from the furnace.

A further object is to provide a casing' which may be easily taken apart or assembled to clean or repair the furnace proper.

To accomplish these objects, provide a casing formed of hollow sections which may be readily bolted together. Each section comprises a hollow body having' a flange on one or more edges forming;l a rabbet 'tor the reception ot the edge ot the next. section.

ln the d awiings which illustrate my invention Figure l is a vertical sectional view oit the device showing the furnace in elevation with part thereoit'. broken away. Fig. 2 is an enlarged sectional view oli' a portion of' the casing showing the method of uniting the sections and inserting the hot air thimbles. Fig. 3 is a partial sectional view showing the cold air inlet.

In the alcove` defined figures, et designates a furnace tire-box, and 5 a radiator located thereabove and dischargingr the products ot' combustion through a :flue 6. The furnace and radiators are surrounded by a casing comprising side, top back and front sections 7, 8, 9 and l0 respectively, the latter of which, l0, may be a single sheet or casting, as is 2generally used. lilith the exception oit the 'front1 all the sections are built up ot' an outer wall ll and an inner wall l2 spaced therefrom. The walls unite in a flange 13 in line with the outer wall. Each wall is lined with sheets 14; of asbestos or other suitable insulating material, held in place by strips or plates ,l5 ot metal riveted through the insulating material, to the wall. "Wherever necessary to prevent the walls ol the sections from bending or buckling, they are stitfened by channel shaped members 1G which are held in place and against which the walls of the casing are drawn by bolts 17. The sections are united preferably by means of au angle iron 1S shaped as shown in Figs. l and 2, which is riveted to the flange of one section and fits over the flange ot the other section to which it is secured by stove bolts 19, or other suitable means. The liront section l0 is provided with a peripheral flange 2O which lies against 'the flanges oilE the surrounding sections and is secured thereto by a Ushaped member 2l and bolts Q2. Acold air inlet', Q3 is provided in the side section ol the casing: near the bottom. This inlet comprises an outwardly flanged outer sleeve Qfl; located between the walls of the section and an outwardly flanged inner sleeve 25 which fits snugly within the outer sleeve. The walls and insulation. are pressed to- `Qether between the flanges of the sleeves and the insulation thus held in place. l similar sleeve QG is located in the top S. to provide outlet for the smoke fille (l. rlhe hot air outlet pipes 27, which extend through the cas` ing, compris a flanged outer sleeve QS located between the walls ot the top section, and an inner sleeve 29 flanged at the inner end and fitting' tightly inside the outer sleeve. This inner sleeve projects above the casing and the projectingl portion thereof is surrounded by a locking' sleeve :2O secured thereto by rivets. or bolts 3l. The walls o'li the casing; and the insulation are held rigidly in their places between the flanges ot the sleeves. lit tor any reason it is `lcund desirable to make tho sections in two or more parts, a union may be efteeted between said parts by riveting' metal straps 32 to the inner and outer walls oti one part oit the section so that a portion oil the straps project above the edge of the part. The other part ot' the sccA tions is then placed between the edges ot the straps and secured by bolts 33 when erecting the casing.

In erecting the casing` the front section l0 is secured to the 'furnace and radiator, the side sections T being; secured thereto by the angle irons 2l. and bolts QQ. the back sections 9 secured to the side sections by the angle irons 18. and lastly, the top section 8 secured in place between the tt'ront. back and side sections by the angle irons t8 and 2l. Cold air enters the casing` through the orifices 23, is heated by radiated heat trom the :furnace and rat'liator and delivered tln'ough the hot air thimbles Q7.

.lt will be obvious trom the 'foregoing' description. that I have provided an inexpensive furnace casing,` which may be readily and quickly assembled or taken apart. The sections are all flat and may be easily handled,

shipped or stored, at a minimum cost. The use of a dead air space between the insulated walls forms a non-absorbent casing which will economize the heat generated by the furnace and deliver practically all of said heat through the hot air thimbles to the heating ues.

Having thus described my invention, what. I claim is A furnace casing comprising a plurality of hollow sections, a flange on the edge of each section forming a rabbet, the edge of one section resting in the rabbet of the adjacent section, the Harige of said first sect-ion projecting transversely beyond the flange of the second section, and a groo-ved strip secured to the flange of the second section anda embracing the flange of the rst section.

In Witness whereof l have hereunto set my hand in the presence of two witnesses.

CHARLES AVERY KENNEDY. VVit-nesses ALEXINA JoNoAs, E. B. /VORTHINGTON.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C." 

